Residential Duct Sizing

• Main supply duct velocity: 900 FPM Max.

• Branch supply duct velocity: 600 FPM Max.

• Supply register velocity: 500 FPM Max.

• Max. supply duct static pressure: 0.10” W.C.

• Main Return duct velocity: 700 FPM Max.

• Branch return duct velocity: 400 FPM Max.

• Return grille velocity: 400 FPM Max.

• Max. filter media (return air) velocity: 400 FPM Max.

• Max. return duct static pressure: 0.08” W.C.